Green high-early-strength low-alkali liquid accelerator and preparation method thereof
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An early-strength, accelerator technology, used in the field of building materials, can solve the problems of small market share, uncommon products, high price, and achieve the effects of reducing erosion, high later strength retention rate, and high early strength.
Active Publication Date: 2019-03-01
JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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Problems solved by technology
[0005] For the development of low-alkali or alkali-free liquid accelerators, my country's scientific research institutions and enterprises have carried out related work, but products with significant performance and ma
Method used
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Embodiment 1
[0030] Aluminum sulfate (38%), sodium fluoride (15%), aluminum ethoxide (10%), triethanolamine maleate (8%), warm rubber (2%), polydimethylsiloxane (0.5 %), and the rest is water.
[0031] A preparation method of the above-mentioned sprayed concrete with low-alkali liquid quick-setting agent, comprising the following steps:
[0032] (1) Add water into the water bath container and heat to 60°C-70°C;
[0033] (2) Keep stirring, add sodium fluoride and aluminum alkoxide to water successively;
[0034] (3) Use a constant flow pump to slowly add the stabilizer, that is, the modified alcohol amine, and the dropping time is completed within 1h-1.5h;
[0035] (4) Keep the constant temperature state, add aluminum sulfate, and continue to stir until completely dissolved;
[0036] (5) Transfer the above solution to a laboratory high-speed shear emulsifier, add suspending agent and defoamer, start the high-speed shear emulsifier, adjust the speed to 3000-5000r / min, and emulsify for 0.5...
Embodiment 2
[0038] Aluminum Sulfate (45%), Sodium Fluoride (10%), Aluminum Isopropoxide (8%), Triethanolamine Maleate (6%), Warm Rubber (3%), Dimethicone (1%) and the rest is water.
[0039] The preparation method refers to Example 1.
Embodiment 3
[0041] Aluminum Sulfate (50%), Sodium Fluoride (10%), Aluminum Ethoxide (6%), Triethanolamine Acetate (4%), Xanthan Gum (2%), Dimethicone (0.5%) ), and the rest is water.
[0042] The preparation method refers to Example 1.
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Abstract
The invention discloses a green high-early-strength low-alkali liquid accelerator. The green high-early-strength low-alkali liquid accelerator is prepared from the following components in percentage by mass: 30-60% of aluminum sulfate, 5-20% of sodium fluoride, 4-10% of alcohol aluminum, 3-10% of a stabilizer, 1-5% of a suspending agent, 0-1% of a defoaming agent and the balance of water. The invention relates to the low-alkali liquid accelerator for sprayed concrete. The low-alkali liquid accelerator has the advantages of being low-alkali, chlorine-free, non-corrosive to human bodies or machines, free of pungent smell, high in early strength, high in later strength retention rate, good in durability and the like; the low-alkali liquid accelerator can greatly reduce the risk of alkali-aggregate reaction in concrete and the erosion to reinforced concrete.
Description
technical field [0001] The invention relates to a preparation method of a green high-early-strength low-alkali liquid accelerator and belongs to the technical field of building materials. Background technique [0002] In engineering construction, sprayed quick-setting concrete is mixed with a certain amount of quick-setting agent in the concrete, which can make the prepared concrete harden quickly in a very short time after adding water and mixing, and reach a certain strength as soon as possible. At present, due to the vigorous construction of domestic highways, railways and other projects and the release of high-demand standards, domestic accelerator products are rapidly changing from powder accelerators to liquid accelerators, and low-alkali and alkali-free products are gradually replacing traditional alkaline accelerator. Among them, traditional alkaline accelerators have problems such as high alkali content, strong corrosion, large strength loss in the later stage, and...
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